NPPES file of Aug 9, 2026

Katherine Mack O'Callaghan, LMHC

Mental Health Counselor · Beverly, MA

Katherine Mack O'Callaghan, LMHC is a mental health counselor with a practice address in Beverly, Massachusetts, and NPI 1871714618, issued on May 1, 2007. Check the license (Massachusetts 8309, as entered in NPPES) with the Massachusetts board that licenses this profession; the federal record below is the public data PlainDoctor holds for this provider.

Record from CMS NPPES, file of Aug 9, 2026 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1871714618
Name
Katherine Mack O'Callaghan
Credential
LMHC
Primary taxonomy
Mental Health Counselor 101YM0800X
License number
8309 MA
Self-reported in NPPES; status is on the state search
Practice location
900 Cummings Ctr Ste 415V, Beverly, MA 01915
Phone
(978) 587-4943
Enumerated
May 1, 2007
Record last updated
Sep 7, 2023
Medicare enrollment
Enrolled (PECOS I20260527002176); may accept Medicare assignment
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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8 nearest mental health counselor records → All 18,415 in Massachusetts → Look up another NPI →

Also registered at 900 Cummings Ctr Ste 415V

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Barbara Martin, LMHCProfessional Counselor1710178736
  2. James Merriam, MA, LMHCCounselor1578717948

Verify Katherine Mack O'Callaghan in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWhich Massachusetts board licenses this profession
    Search for license 8309    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Find the Massachusetts license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

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Katherine Mack O'Callaghan among 18,415 mental health counselor records in Massachusetts

Katherine Mack O'Callaghan, LMHC is one of 18,415 mental health counselor records with a practice address in Massachusetts. 7% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does not. Its NPI, issued in 2007, is newer than 6% of them.

  • NPI issued2007 · 6% of these records are older, 84% newer
  • In a Medicare fileNo · 7% of these records are
  • In the CMS Doctors and Clinicians fileYes · 10% of these records are
  • Graduated2007 · median 2014 among the 1,811 with a school on file
  • Record last updated2023 · 60% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 101YM0800X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

230 mental health counselor records list a practice address in Beverly

They are 230 of the 2,169 NPPES records with a practice address in Beverly, and 18,415 mental health counselor records in Massachusetts. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.

All 18,415 in Massachusetts → Every provider in Beverly → Mental Health Counselor nationwide →

The 8 mental health counselor records with the nearest ZIP codes

  1. Nancy Arnesani, LMHCBeverly, MA 019151285656744
  2. Margaret Baird, RN, LMFT, LMHCBeverly, MA 019151114944162
  3. Patricia Barry, LMHCBeverly, MA 019151578572459
  4. Lynne Bishop, MA LMHCBeverly, MA 019151720191117
  5. Sally Clapp, LMHCBeverly, MA 019151902827710
  6. Dagmar Friedman, LICSWBeverly Farms, MA 019151619950300
  7. Kimberly Hutchins, LMHCBeverly, MA 019151396710299
  8. Ellen Jarmusik, LMHCBeverly, MA 019151982717146

Common questions

What is Katherine Mack O'Callaghan, LMHC's NPI number?

Katherine Mack O'Callaghan, LMHC's National Provider Identifier (NPI) is 1871714618, issued on May 1, 2007. An NPI identifies a provider in billing; it is not a license.

Where is Katherine Mack O'Callaghan, LMHC located?

The NPPES record lists a practice address at 900 Cummings Ctr Ste 415V, Beverly, MA, 01915. Phone: (978) 587-4943. Providers update this record themselves, so call before visiting.

How can I verify Katherine Mack O'Callaghan, LMHC's license?

NPPES lists Massachusetts license number 8309, as entered by the provider. Search the Massachusetts board that licenses this profession; the NPPES record confirms identity only.

Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. An NPI identifies who bills; it is not a license.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.